Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation	$ 36,400	$ 34,600	$ 39,300
Capital expenditures	31,371	38,440	69,404
Fluids systems [Member]
Property, Plant and Equipment [Line Items]
Capital expenditures	17,589	32,310	40,533
Fluids systems [Member] | Conroe and Fourchon Projects [Member]
Property, Plant and Equipment [Line Items]
Capital expenditures	6,900
Mats and integrated services [Member]
Property, Plant and Equipment [Line Items]
Capital expenditures	$ 11,956	4,637	$ 27,456
Mats and integrated services [Member] | Composite mats (rental fleet) [Member]
Property, Plant and Equipment [Line Items]
Reduction In depreciation expense		$ 6,100